Human brain
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The human brain has the same general structure as the brains of other mammals, but is larger than any other in relation to body size. Although in absolute terms whales, elephants, and other large animals have larger brains, when measured using the encephalization quotient, which compensates for body size, the human brain is almost twice as large at the brain of the bottlenose dolphin and three times as large as the brain of a chimpanzee. Much of the expansion comes from the part of the brain called the cerebral cortex, especially the frontal lobes, which are associated with executive functions such as self-control, planning, reasoning, and abstract thought. The portion of the cerebral cortex devoted to vision is also greatly enlarged in human beings, and several cortical areas play specific roles in language, a skill that is unique to humans. Estimates for the number of neurons (nerve cells) in the human brain range from 80 to 120 billion. About 10 billion of these reside in the cerebral cortex. The numerical majority of neurons reside in the cerebellum, which contains vast numbers of tiny neurons called granule cells.
- Related: Aging brain, Cephalic disorders, Cephalization, History of neuroscience, Lobes of the brain, Neural development in humans, Neuroanatomy, Neuroanthropology, Neuroscience, Philosophy of mind, 10% of brain myth
| The Whole Brain Atlas The Whole Brain Atlas www.med.harvard.edu/AANLIB/home.html - Web |
| High-Resolution Cytoarchitectural Primate Brain At... High-Resolution Cytoarchitectural Primate Brain Atlases primate-brain.org - Web |
| Brain Facts and Figures Brain Facts and Figures faculty.washington.edu/chudler/facts.html - Web |
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| Interactive Human Brain 3D Tool Interactive Human Brain 3D Tool www.healthline.com/human-body-maps/brain - Web |
